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<H1>IBM Visualization Data Explorer Programmer&#39;s Reference</H1>
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<H3><A NAME="HDRDXGMID" HREF="progu097.htm#PToC_279">DXGetModuleId</A></H3>
<A NAME="IDX1760"></A>
<A NAME="IDX1761"></A>
<P><STRONG>Function</STRONG>
<P>
Get a unique identifier for each instance of a module.
<P><STRONG>Syntax</STRONG>
<BR>
<TT><STRONG><BR>
&#35;include &lt;dx/dx.h&gt;<BR>
<P><BR>
Pointer DXGetModuleId()<BR>
</STRONG></TT><BR>
<P><STRONG>Functional Details</STRONG>
<P>
<TT><STRONG>DXGetModuleId</STRONG></TT> returns a pointer to a unique
identifier <TT><STRONG>id</STRONG></TT>, which can be used to
generate unique cache tags (e.g., for use by
asynchronous modules).
<P><STRONG>Return Value</STRONG>
<P>
Returns <TT><STRONG>NULL</STRONG></TT> or returns
<TT><STRONG>ERROR</STRONG></TT>
and sets an error code.
<P><STRONG>See Also</STRONG>
<TT><STRONG>
<A HREF="progu304.htm#HDRDXSCEV">DXSetCacheEntry, DXSetCacheEntryV</A>,
<A HREF="progu118.htm#HDRDXCMPMI">DXCompareModuleId</A>,
<A HREF="progu123.htm#HDRDXCPMI">DXCopyModuleId</A>,
<A HREF="progu286.htm#HDRDXRTR">DXReadyToRun</A>
</STRONG></TT>
<P>
<A HREF="progu059.htm#HDRCACHE">13.5 , "Cache"</A>.
<BR>
<A HREF="progu065.htm#HDRASYNS">13.11 , "Asynchronous Services"</A>
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